package com.lkcg.demo.util;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;

/**
 * 这里使用单例模式，保证访问统一  , 通过ApplicationContextAware接口 注入applicationContext
 */
public class SpringContextUtil implements ApplicationContextAware {
    private static ApplicationContext applicationContext; // Spring应用上下文环境

    /**
     * 实现了ApplicationContextAware 接口，必须实现该方法；
     * 通过传递applicationContext参数初始化成员变量applicationContext
     * @param applicationContext
     * @throws BeansException
     */
    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        SpringContextUtil.applicationContext = applicationContext;
    }

    public static ApplicationContext getInstance() {
        return applicationContext;
    }


//    public <T> T getBean(String name) throws BeansException {
//        return (T) applicationContext.getBean(name);
//    }
}
